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The diplopia is the technical name given to the double vision. It is an ocular alteration by which the patient perceives two images of the same object. The Spanish driver Marc Márquez has suffered these vision problems again after the very hard crash at turn 7 that he suffered during the warm up session prior to the Indonesian GP.
diplopia can be constant or intermittent and, depending on where the duplicate image appears (side by side, on top of each other, or both horizontally and vertically), it can be horizontal, vertical, or diagonal.
According to its causes, it can be of two types:
–monocular: Less frequent.
The double image is perceived with only one eye open. It is due to structural alterations of the eyeball (cataracts, astigmatism, problems in the shape of the cornea…).
–binocular: The most frequent. It appears with both eyes open and disappears when either one closes. It is caused by a lack of parallelism of the eyes due to an alteration in the oculomotor system. The circumstances that can most frequently affect the alignment of the eyes are childhood strabismus decompensated in adulthood, paralysis of the oculomotor nerves, neurological diseases (myasthenia gravis), thyroid diseases, brain tumors or cranial and orbital injuries. .
Sometimes the eye can be seen very deviated with respect to the other and other times the deviation is minimal and difficult to appreciate.
In addition to double vision, other symptoms that can appear are eye fatigue, blurred or shadowed vision, difficulty seeing in depth or judging distances and dizziness.
The treatment aims to correct the cause of diplopia. For this it may be necessary to use glasses or contact lenses, prisms, botulinum toxin or surgery.
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